This paper describes our new simulation-based platform for the customer co-design of products and service. This platform is based on the concept model that builds integrated digital models from the real world and analyzes from the simulation results. It explores and maximizes customer value using machine learning algorithms. The platform consists of a workflow constructor and a GUI builder with reusable nodes and templates. An example is given in the oil & gas filed. The customer co-design GUI is built in 5 minutes and can be used to assess the business feasibility of the oil & gas devices.